ELECTRICAL PROBLEM

Two questions:
1. How do I change the bulb that lights up the left side of the dashboard instrument panel (fuel/temp)?

2. Warning light that indicates bulb is burnt out/defective is constantly on (this is prior to instrument panel light problem). It seems the problem bulb/fixture is either the right or left rear stop light. If I fiddle with both of them, the warning light goes out, but comes back on as soon as I start driving away. Any advice?